Buff section manufacture



y 21, 1953 F. H. THOMPSON 2,645,888

BUFF SECTION MANUFACTURE Filed Oct. 1, 1951 fiance/M Emma-a F/a /2 A 3% Patented July 21, 1953 2,645,888 BUFF SECTION MANUFACTURE Frederick E. Thompson, Fremont, Ohio, assignor to The Yerges Manufacturing Company, Fremont, Ohio, a corporation of Ohio 7 Application October 1, 1951, Serial No. 249,077

2 Claims. ((01. 51-193) This invention relates to the manufacture bufling disks comprising the assembly into sections of similar sheet portions of fabric.

This invention has utility when incorporated in radially extending units or sections of. axially collapsed circular elements or sheets of warp and Woof material in exposing bias or major nonfraying peripheral face with taperdepth single ply pockets or fluting for composition holding and divergingly puckered for efficient ventilation in operation.

Referring to the drawings:

Fig. 1 is a side elevation of a fabric circular sheet;

Fig. 2 shows'axial thrust collapse stage for the element of Fig, 1;

Fig. 3 is a side elevation of an assembled collapsed element as the basis for a radial unit;

Fig. 4 is a plan view of an assembly plate with spacing pins for radial grouping thereon of assembly units of Fig. 3;

element Fig. 5 is a side elevation, partly folded back, I

of an adhesive face disk of quick drying property or characteristic;

Fig. 6 is a fragmentary plan view of the radial unit assembly of Fig. 4 with central bonding effective from the disk of Fig. 5;

Fig. 7 is a fabric facing disk of minor dimension relatively to the element of Fig. l, desirably of more heavy fabric and'at least of as great diameter as the disk-of Fig. 5;

Fig. 8 is a portion in plan, showing the concealing of' the adhesive carrying disk by the fabric" disk of Fig. 7 on the radial'unit assembly;

Fig. 9 is a broken away portion showing tensioned thread spiral stitching assembling over both sides of the central region of the converging units of the facing disks;

Fig. 10 is a body-providing reinforcement cardboard type disk;

of the unit assembly'in which the spiral stitching is coated with an additional bonding agent in the assembly of Fig, 10 disks therewith; and I Fig. 12 is a side view of the completed buff section. I

The body or base hereunder as adoptedfor flexibility range of fitting into Wide uses is cotton warp and woof material, preferably a canvas which may vary in threadper inch of 48-48, or even in greater fineness or closeness 80-92. The fineness of the threads in this weave material-1y reduces the tangential extent of fraying at the 90 apart portions of the circular sheet periphery. For 16" diameter bufi body, a practice Fig. 11 is a partly broken away side elevation adopted is to build up from circularsections of 8 elements I of the selected material. In carrying thru, it is convenient to have the center of such elements I, with a center identification marking or small opening 2.

a sleeve 4, an alignedadjacent ring 5 and into a short cylindrical paper or adhesive face tube -6,'

for the .rod 3 to protrude slightly beyond the tube 6. Therod 3 is then withdrawn from the collapsed element to beheld in a unit 1 withits tip I but slightly thru the tube 6 and the ring 5 inward I sufliciently from the larger end of the unit as not 1 to be readily slipped therefrom. The collapsing forms single ply fiuting developed progressively as away from the tube 6. The outer side of the single ply sheet shows the fluting radial and thus diverging in the outwardly-Widening taper ofthe centrally collapsed sheet.

I Grouping of the units is on a rigid circular base 8. having a central marking or port 9. There-. about and slightly inward from the peripheryis an endless annular series of partitions or pins I0. Besides the flexibility to be reached in the :ultimate productfrom the different characters "ofweave in the elements I, the number of the q partitionsoipins I0 has been varied in practice, say from twenty-five .to thirty-two. Even with the same character elements. I, when in the col- ,lapsed unit, its form responds to a flattening out or sector in'the assembly for symmetry of fabric continuity .thruout the full annular extent. I this! grouping, the almost insignificant tubes 6 are in proximity to the port 9.

face I I of .a thinpaper or the like disk I2 to have its central marking I3 in register with the port-9. A cover disk I4, say of heavier stock, such as duck, may have its central marking l5 in register I .with'the' marking- I3 of the. disk I2. The disk- H;

may be of just larger diameter than the disk I2. While the diameter of these disks I2, I4, may be according to the work-down area predetermined for the completedbuflf body. For an area of inward working on a 16 diameter disk, the disk I The adhesive II and its disk I2 The elements I are formed into units by thrusting a rod or stem 3 to carry the marking 2 thru The assembly is effected by placing an adhesive The radial grouping of I the assembly, for at say 25# tension on the thread, there is a tightness giving compactness or firmness to the buff section central body in which the spacing between the pitches of the spiral may be A", or such other selection as may meet the particular job in trade for which it is to be used.

The disk I! determines the area for the spiral stitching I6. Water glass or other binding me dium or cement I! may be coated thereon as an adhesive for cardboard or fiber rigid disk 10.;having a central marking I8 (Fig. 10). With the adhesive I'l mounting a facing disk H! on each side,

and concentric therewith an opening 2| in forming a completed buff element 22' (Fig.12) ,in. which radial pockets 23 are of gradually decrease ing cross section as extending inward from bias or major non-fraying trim 20. The outside-thepockets flutings 24 as in and between the elements 1 provide effective fan vane-like performance in promoting self ventilation, whether the operation speed be in the range of 10,000 lineal feet per minute or 850 lineal feet per minute. The shaft receiving opening 2| may be such as to remove the tubes ii.

General rigidity for the section 22 is had from the thickness adopted for the facing disks I 8, adopted as cardboard, say A," stock. However, in practice such may vary. Use has been of and up to 4; thickness'cardboard. In the buff ring assembly of the section on a shaft or arbor between clamping disks, the thickness adopted for the disks as abutting establishes a looseness or openness for ventilation of the fan-vanelike-providing fiutings 24. There are two factors of practical importance due to the fluting. One is the axial compactness of the several sections 22 grouped on the shaft, and the other is in the build-up of the section 22 as to the number of radial units I. There is ventilation enhancement value in the lack of symmetry developed from the central thrust on the elements I to form the units 1. Such irregularities in the fiutings or pocket sides 24 develops a variance in. the actual number of plies taken parallel to the shaft thru each unit. However, as a mean or average, such works outfor consideration of a section having twentyfive radial units 7 as a 25 ply section, and likewise for thirty-two units in a section to be the practical equivalent of 32 ply section. Actually in practice there is very much improved working efliciency over such number of separate or independent plies due here to the fluting or returnbends and their reinforcement or hold-up values as in the warp and woof stock itself, for in the preferred form as herein disclosed, radially outward from the spiral stitching I6, no extra threads are in the section 22. The flutings or puckers 24 as narrow readily hold the compound 4 or composition for acting upon the work, with resulting increase in speed for efficient performance at the lineal peripheral speed of the buff. According to the inter-section spacing, there may be section assembly yield for pushing work into the rotating buff. For more hard or rigid buffing, the facing disks [8 maybe removed and the spiral stitched central body or core region worn down to, the extent operation economies may take into account. What is claimed and it is desired to secure by Letters Patent is:

1. A method of manufacturing a buffing Wheel from a plurality of single ply fabric disk sheets, 'comprisingz' separately pushing the center of each .sheet through a tubular element to form each sheet into an irregularly fluted conical member of fabric with the apex at the center of each sheet, radially arranging said conical members in a common plane in a circle with their apices adjacent each other to form a circular disk of said members, placing said disk of members between a pair of flat adhesive coated disks to maintain the radial location and relative position of said members in said plane, and then stitching said flat disks to each of said members whereby the center of said flat disks adjacent the apices of said members forms the axis of said buffing wheel.

2. A buffing wheel section consisting of a plurality of similar radially diverging conical members, each of said members being collapsed from a single ply disk of fabric into a conical shape with fluted sides and with the center at the apex of each member, said members being arranged radially in a plane with their apices adjacent each other to form a circular disk so that said apices are all adjacent the axis of said bufiing wheel section, and so that all points on the peripheries of all the disks are equally spaced from the axis of said section, a pair of flat disks on opposite sides of said members and covering said apices, and means for fastening each of said members to said flat disks to maintain their relative location in said bufling wheel section.

FREDERICK H. THOMPSON.

References Cited in the file of this patent UNITED STATES PATENTS Hendrickson Jan. 8, 1952 

